BENEFIT PLANS (Details) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
BENEFIT PLANS [Abstract]
Percentage of employers contribution (in hundredths)	40.00%
Employer matching contribution (in hundredths)	6.00%
Employer contributions	$ 248,000	$ 223,000	$ 202,000

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration